Invoice with deposit amount and date and purchase order

Hi I am not sure if it is possible to have the invoice include a deposit or down payment for split payments and having that paid immediately with the remainder paid via another date? Also if the client requires a purchase order on the invoice or is this done via template design by me?

I also have if people pay via paypal to add the paypal fees so not sure if that is an option as well. If they pay via bank transfer then I don’t add it.

Thanks…

[size=10]Last Update: 09.01.2016[/size]